The roads of Nigeria traverse a territory of sharp contrasts in climate, soil and vegetation. In the swampy areas and dense forests of the South annual rainfall ranges from 80 to 200 inches but is as low as 10 inches in the desert areas of the North. The elevation is seldom more than 2,000 feet, except in the Plateau area around Jos in the Northern Region, and in the Southern Cameroons where there are large inhabited areas over 4,000 feet high.
The length of the road system in 1953 may be estimated at about 29,000 miles, or approximately 77 miles of road per thousand square miles, a high road density for Africa. As shown in Table 1, however, there are considerable variations in density among different parts of the country.
Miles of Road|
|SOURCE: Regional Public Works Departments.|
For administrative purposes, roads are classified as Trunk Roads A, Trunk Roads B and local roads. Trunk Roads A are constructed and maintained with federal funds. They are roads of interregional and international importance and they constitute the basic frame-work of the road system decided upon in 1946. When completed, the system will consist of three main south-north arteries, five main west-east